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Multiple-input multiple-output (MIMO) radars with wideband signals are useful to discriminate target in clutter. With wideband MIMO radar, the problem of extended target detection in compound-Gaussian clutter is considered in this paper. By obtaining target echoes from each antenna, the detector based on generalized likelihood ratio test (GLRT) is developed. It shows that the shape parameter of clutter,...
Schottky barrier radiation detectors were fabricated on 12 μm n-type 4H-SiC epitaxial layers grown on a 4° off-axis highly doped 4H-SiC substrate (0001). Schottky barrier junction properties were characterized through current-voltage (I-V) and capacitance-voltage (C-V) measurements. A diode ideality factor of 1.29 and Schottky barrier height of 1.10 eV were determined from the forward I-V characteristics...
This paper presents a distinctive rectangle feature Multi-Scale Local Ternary Patterns (MS-LTP) for face detection. The MS-LTP is a generalization of the Local Ternary Patterns (LTP) [1] and is able to capture larger scale structures of faces. It's less sensitive to noise and more discriminative that can reduce the number of weak classifiers for the AdaBoost learning algorithm to construct a strong...
We propose a simple method for the generation of signature matrices for a space-time spreading (STS) system with BPSK modulation, where a signature sequence assigned to a user is paritioned into segements and the segments are assigned to the transmit antennas of the user. We show that, if the signature sequences are linearly independent, the STS system does not has an error floor in its BER performance...
Detecting pedestrians in images is a challenging task, especially for the intelligent vehicle environment where there is a real-time requirement which limits the computational complexity of algorithms. In this paper, we demonstrate a near real-time and robust pedestrian detection system in the context of intelligent vehicle. This is achieved by integrating Locally Assembled Binary (LAB) features with...
In recent years, virtualization technology has been widely applied to traditional computing environment. As it provides strong flexibility, the security in face of attacks to network services becomes a significant challenge. In this paper, we propose a novel architecture to detect intrusion in virtual computing environment and implement a prototype, named VNIDS. In this system, a particular VM is...
Networked sensing promises to drastically change the way people interact with their environments by providing rich contextual information in real time. Major challenges remain on how concurrent users program and control such environments at the application level. This paper summarizes our research efforts in automatically composing semantics services to fulfill declarative user queries in resource...
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